Symphyotrichum eulae

(Shinners) G. L. Nesom

Phytologia 77: 281. 1995.

Common names: Eula’s aster
Endemic
Basionym: Aster eulae Shinners Field & Lab. 18: 35. 1950
Treatment appears in FNA Volume 20. Treatment on page 516. Mentioned on page 469, 470, 501.

Perennials, 5–150 cm, colonial; long-rhizomatous (rhizomes thick). Stems 1–3+, erect (straight, stout), glabrous. Leaves firm, margins serrulate to serrate, distally entire, ± revolute, scabrous, apices mucronate, abaxial faces glabrous or glabrate, adaxial scabrous, cauline often with axillary tufts of leaves; basal withering by flowering, petiolate (petioles slightly winged, ciliate, sheathing), blades ovate or elliptic to elliptic-lanceolate, 15–120 × 15–35 mm, bases gradually to ± abruptly attenuate, margins crenate-serrate, apices obtuse to acute; proximal cauline withering by flowering, petiolate to subpetiolate (clasping), blades elliptic to lanceolate, 85–100 × 18–30 mm, bases cuneate to slightly attenuate, apices acute to acuminate; distal sessile, blades elliptic or elliptic-lanceolate to lanceolate, or lance-oblong to linear-lanceolate (arrays), 8–90 × 1–25 mm, progressively reduced distally, abruptly so in arrays, bases cuneate, margins entire, apices acute to acuminate. Heads in leafy, open, paniculiform arrays, branches ascending to divaricate, nearly horizontal, elongate (to 38 cm), secund-racemiform. Peduncles 0.4–3 cm, secund, glabrous, bracts 5–10, not crowded, linear to linear-lanceolate, spreading, foliaceous, grading into phyllaries. Involucres hemispheric, (4–) 5–6.5 mm. Phyllaries in 5–6 series, lanceolate to oblong-lanceolate (some inner linear), unequal, bases indurate 1/3–2/3, margins scarious, erose, hyaline, sparsely ciliolate, green zones lanceolate, prominent, apices acute (acuminate), slightly spreading, faces glabrous. Ray-florets (20–) 27–36; corollas usually white to bluish or lavender-white, rarely pale lavender or lavender-pink, laminae 8–11 × 1–1.5 mm. Disc-florets 25–31; corollas yellow turning reddish then brown, (4.1–) 4.5–5.8 mm, tubes shorter than funnelform throats, lobes recurved to erect, lanceolate, 1.1–1.3 mm. Cypselae tan to reddish-brown, obovoid to fusiform-obovoid, ± compressed, 1.4–2.9 mm, 4–5-nerved, faces strigillose; pappi white (sordid), 4.5–5.8 mm. 2n = 48.


Phenology: Flowering Oct.
Habitat: Usually partly shaded, heavy-clayey, clayey-loamy, or silty soils, banks, open stream-bottom woods, ditches, drainage systems, disturbed areas, hedgerows
Elevation: 0–100 m

Discussion

Symphyotrichum eulae is known only from Texas. It has been reported as a hybrid of S. lanceolatum and S. praealtum. It is not a hybrid, according to Shinners, and we are not considering it as such here.

Selected References

None.

Lower Taxa

None.
... more about "Symphyotrichum eulae"
glabrate +  and glabrous +
not tailed +, rounded +  and obtuse +
petiolate +  and subpetiolate +
distinct +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
subequal +
scarious +
18mm +  and 30mm +
usually triangular +  and linear +
usually deltate +  and lanceolate +
paniculiform +, open +  and leafy +
indeterminate +  and determinate +
Luc Brouillet +, John C. Semple +, Geraldine A. Allen +, Kenton L. Chambers +  and Scott D. Sundberg† +
(Shinners) G. L. Nesom +
petiolate +  and subpetiolate +
8.5 cm85 mm <br />0.085 m <br /> (10 cm100 mm <br />0.1 m <br />) +
cuneate +, acute +  and acuminate +
indurate +
18mm;30mm +
Aster eulae +
petiolate +  and subpetiolate +
0.8 cm8 mm <br />0.008 m <br /> (9 cm90 mm <br />0.09 m <br />) +
elliptic-lanceolate;lanceolate or lance-oblong +
reduced +
1mm;25mm +
rugulose +  and muricate +
not crowded +
linear +  and linear-lanceolate +
secund-racemiform +
horizontal;ascending +
elongate +
barbellulate +  and barbellate +
sessile +  and petiolate +
Eula’s aster +
not 2-lipped +  and actinomorphic +
0.41 cm4.1 mm <br />0.0041 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
yellow turning reddish then brown +, usually white +  and bluish or lavender-white rarely pale lavender or lavender-pink +
at maturity , more or less ampliate , tubes usually shorter +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
beaked +, 2-ribbed +  and 5-ribbed +
tan +  and reddish-brown +
strigillose +  and glabrous +
compressed +, obovoid +  and fusiform-obovoid +
fertile +  and bisexual +
fertile +  and bisexual +
0–100 m +
strigillose +  and glabrous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
Usually partly shaded, heavy-clayey, clayey-loamy, or silty soils, banks, open stream-bottom woods, ditches, drainage systems, disturbed areas, hedgerows +
disciform +  and radiate +
indeterminate +
heterogamous +  and homogamous +
each +  and sessile +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
hemispheric +
0.5 cm5 mm <br />0.005 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.1 cm21 mm <br />0.021 m <br />) +
2 (?) +  and 5 (?) +
1mm;1.5mm +
sessile +  and petiolate +
cauline +  and basal +
decurrent +
recurved;erect +
lanceolate +
entire +, serrulate +  and serrate +
attenuate +
2-carpellate +
persistent +
25 +  and 40 +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.58 cm5.8 mm <br />0.0058 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Oct. +
lanceolate +  and oblong-lanceolate +
styliferous +, neuter +  and pistillate +
bearing subulate enations +, hairy +  and bristly +
flat;slightly convex +
exalbuminous +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.1mm;0.2mm +
branched +  and simple +
1 +  and 3 +
appendaged +  and truncate +
papillate +  and smooth +
Aster sect. Heterastrum +  and Aster subg. Symphyotrichum +
Symphyotrichum eulae +
Symphyotrichum sect. Symphyotrichum +
species +
funnelform-campanulate +  and cylindric +
ampliate +
5 cm50 mm <br />0.05 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
tree +, shrub +  and subshrub +
lanceolate +